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Sagot :

Bonjour,

2x + 4x + 12x = 144

18x = 144

x = 144/18 = 8

6x + 4x + 40 = 520

10x + 40 = 520

10x = 520 - 40

10x = 480

x = 480/10 = 48

8x + 10 = 10x + 4

8x - 10x = 4 - 10

-2x = -6

x = -6/-2 = 6/2 = 3

10x - 14 = 16x - 26

10x - 16x = - 26 + 14

-6x = -12

x = -12/-6 = 12/6 = 2

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